
console.log(123);
// console.log(arguments.callee.toString())
module.exports = '测试';


/**
  function require(module){
    //读取 module 的代码字符串
    let code = fs.readFile(module);
    var module = {};
    var __dirname = '...';
    var __filename = '...';
    var exports = module.exports = {};
    //包裹
    ((exports, require, module, __filename, __dirname) => {
      code
      module.exports = 'love';
    })(exports, require, module, __filename, __dirname);

    return module.exports;
  }
 */